scala/scala — pull request #817 by lrytz (2012-07-03 14:18:37+00:00)
Title: enable attachments for symbols. fixes SI-5975, an ide bug with default args.

gets rid of the global hash maps in Namers and NamesDefaults

review by @dragos. i assume there should not be memory leaks, the symbol attachments should get GC'd together with the symbol

review by @dotta to make sure i merge-squashed his code correctly
review by @xeno-by for symbol attachments